Following on from my problem with the @For loop in the thread just above this,
I have re-achitected my page to use the @InvokeListener componenent.
The problem I am trying to address is that roleList (see below) is read from a
database via a single SQL instruction, and I want to avoid having to re-read
it to see if a record is changed in the form - to see if I need to update it.
I am doing something like this
<span jwcid="@For" source="ognl:roleList" value="ognl:role">
<span jwcid="@InvokeListener" listener="listener:saveOriginal" />
<input jwcid="[EMAIL PROTECTED]" value="ognl:role.name" />
... (other fields)
<span jwcid="@InvokeListener" listener="listener:doUpdate" />
</span>
In my java page class I have the following
public abstract Role getRole();
public abstract Role getOriginal();
public abstract void setOriginal(Role role);
and the listeners
public void saveOriginal(IRequestCycle cycle) {
if (cycle.isRewinding()) {
Role role = new Role(getRole()); //Role class
creates a cloned object
setOriginal(role);
}
}
public void doUpdate(IRequestCycle cycle) {
if(cycle.isRewinding()) {
Role updatedRole = getRole();
Role originalRole = getOriginal();
...
I display the page, and in one of the rolenam Textfields I change the value
and submit the form.
I can put breakpoint in "saveOriginal", and can see the getRole() call
bringing in the value that the @For loop saved in a hidden field before its
been updated from the form field.
I then continue on until the second listener and hit a breakpoint there. At
this point, I would expect the getOriginal to return the same value that I
set in the first listener. But it doesn't - it also seems to have been
updated from the form fields.
Am I missing something stupid here (I could imagine if the clone had not
worked properly this wouldn't have worked) but in the Role constructor I do
this ...
public Role(Role r) {
this.name = new String(r.name);
...
Or is the @For loop doing something strange?
--
Alan Chandler
http://www.chandlerfamily.org.uk
Open Source. It's the difference between trust and antitrust.
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